unify my-3

src/client/js/components/PageAttachment.jsx

@@ -150,7 +150,7 @@ class PageAttachment extends React.Component {
 
         {deleteAttachmentModal}
 
-        <div className="d-flex justify-content-center">
+        <div className="my-3 d-flex justify-content-center">
           <PaginationWrapper
             activePage={this.state.activePage}
             changePage={this.handlePage}

src/client/js/components/PageList.jsx

@@ -63,7 +63,7 @@ const PageList = (props) => {
         {pageList}
       </ul>
       <div
-        className="d-flex justify-content-center"
+        className="my-3 d-flex justify-content-center"
       >
         <PaginationWrapper
           activePage={activePage}

src/client/js/components/PageTimeline.jsx

@@ -85,7 +85,7 @@ class PageTimeline extends React.Component {
             </div>
           );
         }) }
-        <div className="d-flex justify-content-center">
+        <div className="my-3 d-flex justify-content-center">
           <PaginationWrapper
             activePage={this.state.activePage}
             changePage={this.handlePage}